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GTX 770 SLI Problems...

Samin

Samin

Samin

Associate
Joined
3 Oct 2013
Posts
55
Hi,

I've just purchased another GTX 770 and I've installed it, the computer has recognised that there are two cards however there is no option in Nvidia control panel to run SLI configuration.

The card in the first slot is an Gainward Phantom GTX 770 4GB and the second card is a MSI GTX 770 Gaming Series 2GB

I'm aware that the cards have different amounts of memory i've been told that the 4GB card would downscale itself to 2GB to match with the other card.

Any help would be appreciated.

Thanks
 
What motherboard do you have? Also iirc you needed a certain coolbits hack to run cards with different vram amounts.
 
That hack was required on older cards/motherboards, though i never needed it myself as i always had identical cards in sli. The v pro is sli capable as i used it myself a while back, have you tried swapping the cards around?
 
From what ive read, even using the coolbits hack can still cause errors. Any chance you can exchange the most recently purchased card?
 
Yeah definitely in the right slots, previously I had two GTX 670 in SLI and they ran fine. I'm using the same SLI bridge I used for them.
 
Ok, I read a bit about different VRAM GPU SLI, apparently you can't anymore.

- All GPUs must have the same amount of VRAM and an identical Bus Width
-- You cannot use a "2GB" version with a "4GB" version or "3GB" version with a "6GB" version in SLI or a 1GB 192 bit bus with a 1GB 256 bit bus Etc.
Note: It used to be possible to enable SLI on cards with differing VRAM but this is no longer available.

Taken from: https://forums.geforce.com/default/...s-work-in-sli-quot-sli-what-works-with-what-/

So, yea, there's your answer.
 
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